How to check if a specific thing exists in quick.db? - discord.js

Question

So i was making a discord game bot where you collect chracters by opening chests, but the problem is that the characters appear again when you already have them.
I used the method db.push
the code:
if(has === true){
console.log(has)
let embed = new discord.MessageEmbed()
.setTitle('Chest Opening | Clash Chest')
.setDescription("<#"+message.author+"> got:\n"+amount+" :coin:")
.setColor('RANDOM')
.setFooter('Created by Tahmid GS#1867')
message.channel.send(embed)
await db.fetch(`coin_${message.author.id}`)
db.add(`coin_${message.author.id}`, amount)
}
else if(has === false){
console.log(has)
await db.fetch(`troop_${message.author.id}`)
db.push(`troop_${message.author.id}`, nada)
let embed = new discord.MessageEmbed()
.setTitle('Chest Opening | Clash Chest')
.setDescription("<#"+message.author+"> got:\n"+amount+" :coin:\n||Common: "+nada+"||")
.setColor('RANDOM')
.setFooter('Created by Tahmid GS#1867')
message.channel.send(embed)
await db.fetch(`coin_${message.author.id}`)
db.add(`coin_${message.author.id}`, amount)
await db.fetch(`card_${message.author.id}`)
db.add(`card_${message.author.id}`, 1)
}
has is let has = db.has(troop_${message.author.id}, nada)
I used let has = db.has(troop_${message.author.id}.nada)
and let has = db.has(nada,troop_${message.author.id})
But it doesn't seem to work, in the console is "false"
nada is the random chracter

Answer 1

You are checking if the database has a specific key. In the database under the key troop_${message.author.id} there is an array. You want to check if that array includes the character or not.
let has = (db.get(`troop_${message.author.id}`) || []).includes(nada);
Also you might want to check for the possibility that db.get() returns undefined or something like that. In that case we call .includes() on an empty array. Instead of getting an error TypeError: Cannot read property 'includes' of undefined.